id large_stringlengths 9 16 | title large_stringlengths 1 382 | abstract large_stringlengths 3 6.09k | publish_date date32 | update_date date32 | categories large listlengths 1 13 | authors large_stringlengths 3 62.8k |
|---|---|---|---|---|---|---|
cond-mat/9408059 | Nonequilibrium Dynamics of Fluctuating Lines | These notes are for the proceedings of the NATO Advanced Study Insitutue on
"Scale Invariance, Interfaces, and Non--Equilibrium Dynamics", held at the
Isaac Newton Institute, 20--30 June 1994. The four lectures address a number of
issues related to dynamic fluctuations of lines in non-equilibrium
circumstances. The fir... | 1994-08-19 | 2007-05-23 | [
"cond-mat"
] | Mehran Kardar and Deniz Ertas |
cond-mat/9408060 | Escape from Metastability via Aging: Non-Equilibrium Dynamics in a One-
Dimensional Ising Model | The non-equilibrium dynamics of a one-dimensional Ising model with uniform,
short-ranged three-spin interactions is investigated. It is shown that this
model possesses an exponentially large number of metastable configurations that
are stable against single spin flips. This glass-like situation results in a
complete fr... | 1994-08-19 | 2007-05-23 | [
"cond-mat",
"hep-lat"
] | J. Kisker H. Rieger and M. Schreckenberg |
cond-mat/9408058 | Random-Matrix Theory of Quantum Size Effects on Nuclear Magnetic
Resonance in Metal Particles | The distribution function of the local density of states is computed exactly
for the Wigner-Dyson ensemble of random Hamiltonians. In the absence of
time-reversal symmetry, precise agreement is obtained with the "supersymmetry"
theory by Efetov and Prigodin of the NMR lineshape in disordered metal
particles. Upon break... | 1994-08-19 | 2017-12-07 | [
"cond-mat"
] | C.W.J. Beenakker (Instituut-Lorentz, Leiden, The Netherlands) |
cond-mat/9408051 | Anharmonic decay of phonons in semiconductors from first-principles
calculations | The anharmonic contribution to phonon lifetime and its temperature dependence
is calculated from first principle in C, Si and Ge using third-order
density-functional perturbation theory. Good agreement with available
experimental data is obtained. Different competing two-phonon decay channels
are compared and correlate... | 1994-08-18 | 2007-05-23 | [
"cond-mat"
] | Alberto Debernardi, Stefano Baroni and Elisa Molinari |
cond-mat/9408052 | Staggered Superconductivity in UPt$_3$: A New Phenomenological Approach | We present a new Ginzburg-Landau theory for superconductivity in UPt$_3$,
based upon a multicomponent order parameter transforming under an irreducible
space group representation; the phase is staggered in real space. Our model can
explain the $H-T-P$ phase diagram including the tetracritical point for all
field direct... | 1994-08-18 | 2009-10-22 | [
"cond-mat"
] | R. Heid, Ya. B. Bazaliy, V. Martisovitsi, and D. L. Cox |
cond-mat/9408049 | Impurity spin coupled to strongly correlated electron system: Ground
State Properties | Revised version, a few typing errors that might cause confusion of physics
argument in the article have been corrected. | 1994-08-18 | 2009-10-22 | [
"cond-mat"
] | D. F. Wang and C. Gruber |
cond-mat/9408050 | One dimensional exactly solvable models of strongly correlated electrons
of $1/r^2$ hopping and exchange | We review some recent progresses in study of the 1D strongly correlated
electron systems of long range hopping and exchange. The systems are completely
integrable, with infinite number of constants of motions. The results of the
physical properties, such as wavefunctions, the full excitation spectrum and
the thermodyna... | 1994-08-18 | 2007-05-23 | [
"cond-mat"
] | C. Gruber and D. F. Wang |
cond-mat/9408048 | Self-Diffusion in Random-Tiling Quasicrystals | The first explicit realization of the conjecture that phason dynamics leads
to self-diffusion in quasicrystals is presented for the icosahedral Ammann
tilings. On short time scales, the transport is found to be subdiffusive with
the exponent $\beta\approx0.57(1)$, while on long time scales it is consistent
with normal ... | 1994-08-18 | 2009-10-22 | [
"cond-mat"
] | M V Jaric and E S Sorensen |
cond-mat/9408044 | High-Pressure Low-Symmetry Phases of Cesium Halides from First Principle
Techniques | The relative stability of different high-pressure phases of various Cesium
Halides is studied from first principles and analyzed using the Landau theory
of phase transitions. We present results for CsI, CsBr, and CsCl up to
pressures of about 100 GPa. A cubic-to-orthorhombic transition, driven by the
softening of an ac... | 1994-08-17 | 2007-05-23 | [
"cond-mat"
] | M. Buongiorno Nardelli, S. Baroni, P. Giannozzi |
cond-mat/9408043 | Universal relation between longitudinal and transverse conductivities in
quantum Hall effect | We show that any critical transition region between two adjacent Hall
plateaus in either integer or fractional quantum Hall effect is characterized
by a universal semi-circle relationship between the longitudinal and transverse
conductivities, provided the sample is homogeneous and isotropic on a large
scale. This conc... | 1994-08-17 | 2009-10-22 | [
"cond-mat"
] | Igor Ruzin and Shechao Feng |
cond-mat/9408046 | Universality in the One-Dimensional Self-Organized Critical Forest-Fire
Model | We modify the rules of the self-organized critical forest-fire model in one
dimension by allowing the fire to jump over holes of $\le k$ sites. An analytic
calculation shows that not only the size distribution of forest clusters but
also the size distribution of fires is characterized by the same critical
exponent as i... | 1994-08-17 | 2015-06-25 | [
"cond-mat"
] | Barbara Drossel, Siegfried Clar, and Franz Schwabl |
cond-mat/9408045 | Crossover from Percolation to Self-Organized Criticality | We include immunity against fire as a new parameter into the self-organized
critical forest-fire model. When the immunity assumes a critical value,
clusters of burnt trees are identical to percolation clusters of random bond
percolation. As long as the immunity is below its critical value, the
asymptotic critical expon... | 1994-08-17 | 2009-10-22 | [
"cond-mat"
] | Barbara Drossel, Siegfried Clar, and Franz Schwabl |
cond-mat/9408047 | One-Particle an Two-Particle Instability of Coupled Luttinger Liquids | It is shown that the Luttinger liquid is unstable to arbitrarily small
transverse hopping. It becomes either a Fermi liquid or exhibits long-range
order at zero temperature. The crossover temperatures below which either
transverse coherent band motion or long-range order start to develop can be
finite even when spin an... | 1994-08-17 | 2009-10-22 | [
"cond-mat"
] | Daniel Boies, C. Bourbonnais, A.-M. S. Tremblay (D\'epartement de
Physique and Centre de Recherche en Physique du Solide Universit\'e de
Sherbrooke, Sherbrooke, Qu\'ebec, Canada) |
cond-mat/9408042 | Integration formulas and exact calculations in the Calogero-Sutherland
model | Some integration formulas which either occur or are implicit in Ha's recent
exact calculation of some correlations in the Calogero-Sutherland model are
discussed. These integration formulas include the calculation of the inner
product $<0|\rho (0)|\kappa>$ between the density operator acting on an excited
state and the... | 1994-08-15 | 2009-10-22 | [
"cond-mat"
] | P.J. Forrester |
cond-mat/9408040 | Does a magnetic field modify the critical behaviour at the
metal-insulator transition in 3-dimensional disordered systems? | The critical behaviour of 3-dimensional disordered systems with magnetic
field is investigated by analyzing the spectral fluctuations of the energy
spectrum. We show that in the thermodynamic limit we have two different
regimes, one for the metallic side and one for the insulating side with
different level statistics. ... | 1994-08-12 | 2009-10-22 | [
"cond-mat"
] | E. Hofstetter and M. Schreiber |
cond-mat/9408041 | Anomalous Elasticity of Polymer Cholesterics | We show that polymer cholesterics have much longer pitches than comparable
short molecule cholesterics, due to their anomalous elasticity. The pitch $P$
of a chiral mixture with concentration $c$ near the racemic (non-chiral)
concentration $c^*$ diverges like $\vert c-c^*\vert^{-\nu}$ with $\nu=1.43 \pm
0.04$ (for shor... | 1994-08-12 | 2009-10-22 | [
"cond-mat"
] | Randall D. Kamien and John Toner |
cond-mat/9408039 | Formulating a first-principles statistical theory of growing surfaces in
two-dimensional Laplacian fields | A statistical theory of two-dimensional Laplacian growths is formulated from
first-principles. First the area enclosed by the growing surface is mapped
conformally to the interior of the unit circle, generating a set of dynamically
evolving quasi-particles. Then it is shown that the evolution of a
surface-tension-free ... | 1994-08-11 | 2009-10-22 | [
"cond-mat"
] | Raphael Blumenfeld (CNLS, Los Alamos Nat'l Lab., Los Alamos, NM.) |
cond-mat/9408038 | Beyond the Nca: New Results for the Spectral Properties of the Anderson
Model | In the framework of direct perturbation theory a fully self-consistent
approximation beyond the well known NCA will be presented for the Anderson
Model. The resummation of a class of skeleton diagrams up to infinite order in
$V$ includes all contribution up to the order $O(1/N^2)$ ( $N$ = degeneracy of
the magnetic sta... | 1994-08-11 | 2009-10-22 | [
"cond-mat"
] | F.B. Anders |
cond-mat/9408032 | Interface Motion in Random Media at Finite Temperature | We have studied numerically the dynamics of a driven elastic interface in a
random medium, focusing on the thermal rounding of the depinning transition and
on the behavior in the $T=0$ pinned phase. Thermal effects are quantitatively
more important than expected from simple dimensional estimates. For sufficient
low tem... | 1994-08-10 | 2009-10-22 | [
"cond-mat"
] | Lee-Wen Chen, M. Cristina Marchetti (Dept. of Physics, Syracuse U.) |
cond-mat/9408033 | Tunneling into a Two-Dimensional Electron Liquid in a Weak Magnetic
Field | We study the spectral density function of a two-dimensional electron liquid
in a weak magnetic field, the filling factor $\nu\gg 1$. A hydrodynamic model
for low-energy excitations of the liquid is developed. It is found that even at
$\nu\gg 1$ the density of states exhibits a gap at low energies. Its width
$2E_0$ depe... | 1994-08-10 | 2016-08-31 | [
"cond-mat"
] | I. L. Aleiner, H. U. Baranger, and L. I. Glazman |
cond-mat/9408034 | Phonon Absorption at the Magneto-Roton Minimum in the Fractional Quantum
Hall Effect | We have made the first phonon absorption measurements in the fractional
quantum Hall r\'egime. Experiments have been conducted on two samples which
have similar electron densities but greatly differing mobilities. The energy
gaps as measured by activation studies of the longitudinal resistance differ by
a factor of two... | 1994-08-10 | 2009-10-22 | [
"cond-mat"
] | CJ Mellor, RH Eyles, JE Digby, AJ Kent, KA Benedict, LJ Challis, M
Henini, CT Foxon and JJ Harris |
cond-mat/9408035 | Integer Quantum Hall Effect for Lattice Fermions | A two-dimensional lattice model for non-interacting fermions in a magnetic
field with half a flux quantum per plaquette and $N$ levels per site is
considered. This is a model which exhibits the Integer Quantum Hall Effect
(IQHE) in the presence of disorder. It presents an alternative to the
continuous picture for the I... | 1994-08-10 | 2009-10-22 | [
"cond-mat"
] | K. Ziegler |
cond-mat/9408031 | Slow Relaxation in a Model with Many Conservation Laws : Deposition and
Evaporation of Trimers on a Line | We study the slow decay of the steady-state autocorrelation function $C(t)$
in a stochastic model of deposition and evaporation of trimers on a line with
infinitely many conservation laws and sectors. Simulations show that $C(t)$
decays as different powers of $t$, or as $\exp (-t^{1/2})$, depending on the
sector. We ex... | 1994-08-10 | 2009-10-22 | [
"cond-mat"
] | Mustansir Barma and Deepak Dhar |
cond-mat/9408036 | Alouani {\it et al.} Reply to Comment on Tuning of the CDW in MX Chains | This is a reply to J. T. Gammel's Comment (9404047) on Tuning of the CDW in
MX Chains. We show that while the harmonic elastic energy can fit a small
region around zero dimerization, it is insufficient to treat the large
amplitude CDW of the MX systems which was the main physics of our Letter (Phys.
Rev. Lett. {\bf 71}... | 1994-08-10 | 2007-05-23 | [
"cond-mat"
] | M. Alouani, J. W. Wilkins, R. C. Albers, and J. M. Wills |
cond-mat/9408037 | Dynamics of a Driven Single Flux Line in Superconductors | We study the low temperature dynamics of a single flux line in a bulk type-II
superconductor, driven by a surface current, both near and above the onset of
an instability which sets in at a critical driving. We found that above the
critical driving, the velocity profile of the flux line develops a
discontinuity. | 1994-08-10 | 2009-10-22 | [
"cond-mat"
] | Colin Denniston and Chao Tang |
cond-mat/9408030 | Suppression of the Kondo Effect in Quantum Dots by Even-Odd Asymmetry | We analyze here a model for single-electron charging in semiconductor quantum
dots that includes the standard Anderson on-site repulsion (U) as well as the
spin-exchange ($J_d$) that is inherently present among the electrons occupying
the various quantum levels of the dot. We show explicitly that for
ferromagnetic coup... | 1994-08-08 | 2009-10-22 | [
"cond-mat"
] | Yi Wan, Philip Phillips and Qiming Li (Loomis Laboratory of Physics,
University of Illinois at Urbana-Champaign) |
cond-mat/9408029 | Absence of a Phase Transition in a Three--Dimensional Vortex Glass Model
with Screening | We study the gauge glass model for the vortex glass transition in type--II
superconductors, including screening of the interaction between vortices.
{}From the size dependence of the domain wall energy we find that, in
two--dimensions, the transition is at $T=0$ both with and without screening but
the exponents are dif... | 1994-08-08 | 2009-10-22 | [
"cond-mat"
] | H.S. Bokil and A. P. Young |
cond-mat/9408028 | Optical response of C$_{60}$ and C$_{70}$ fullerenes: | Molecular exciton effects in the neutral and maximally doped C$_{60}$
(C$_{70}$) are considered using a tight binding model with long-range Coulomb
interactions and bond disorder. By comparing calculated and observed optical
spectra, we conclude that relevant Coulomb parameters for the doped cases are
about half of tho... | 1994-08-08 | 2007-05-23 | [
"cond-mat"
] | Kikuo Harigaya and Shuji Abe (Fundamental Physics Section,
Electrotechnical Laboratory, Japan) |
cond-mat/9408026 | Competition Between Antiferromagnetic Order and Spin-Liquid Behavior in
the Two-Dimensional Periodic Anderson Model at Half-Filling | We study the two-dimensional periodic Anderson model at half-filling using
quantum Monte Carlo (QMC) techniques. The ground state undergoes a magnetic
order-disorder transition as a function of the effective exchange coupling
between the conduction and localized bands. Low-lying spin and charge
excitations are determin... | 1994-08-05 | 2009-10-22 | [
"cond-mat"
] | M. Vekic, J.W. Cannon, D.J. Scalapino, R.T. Scalettar, and R.L. Sugar |
cond-mat/9408022 | Algebraic Aspects of Abelian Sandpile Models | The abelian sandpile models feature a finite abelian group $G$ generated by
the operators corresponding to particle addition at various sites. We study the
canonical decomposition of $G$ as a product of cyclic groups $G = Z_{d_1}
\times Z_{d_2} \times Z_{d_3} >... \times Z_{d_g}$ where $g$ is the least
number of genera... | 1994-08-05 | 2009-10-22 | [
"cond-mat"
] | D. Dhar, P. Ruelle, S. Sen and D.-N. Verma |
cond-mat/9408025 | Microscopic Analysis of the Non-Dissipative Force on a Line Vortex in a
Superconductor: Berry's Phase, Momentum Flows and the Magnus Force | A microscopic analysis of the non-dissipative force ${\bf F}_{nd}$ acting on
a line vortex in a type-II superconductor at $T=0$ is given. We first examine
the Berry phase induced in the true superconducting ground state by movement of
the vortex and show how this induces a Wess-Zumino term in the hydrodynamic
action $S... | 1994-08-05 | 2009-10-22 | [
"cond-mat"
] | Frank Gaitan |
cond-mat/9408020 | Algebraic Aspects of Abelian Sandpile Models | The abelian sandpile models feature a finite abelian group G generated by the
operators corresponding to particle addition at various sites. We study the
canonical decomposition of G as a product of cyclic groups G = Z_{d_1} X
Z_{d_2} X Z_{d_3}...X Z_{d_g}, where g is the least number of generators of G,
and d_i is a m... | 1994-08-05 | 2007-05-23 | [
"cond-mat"
] | D. Dhar, P. Ruelle, S. Sen and D.-N. Verma |
cond-mat/9408023 | Strong Coupling Expansions for Antiferromagnetic Heisenberg S=1/2
Ladders | The properties of antiferromagnetic Heisenberg $S=\frac{1}{2}$ ladders with
2, 3, and 4 chains are expanded in the ratio of the intra- and interchain
coupling constants. A simple mapping procedure is introduced to relate the 4
and 2-chain ladders which holds down to moderate values of the expansion
parameters. A second... | 1994-08-05 | 2009-10-22 | [
"cond-mat"
] | M. Reigrotzki, H. Tsunetsugu, and T.M. Rice |
cond-mat/9408024 | Singlet Stripe Phases in the planar t-J Model | The energies of singlet stripe phases in which a plane is broken up into spin
liquid ladders by lines of holes, is examined. If the holes were static then
patterns containing spin liquids with a finite spin gap are favored. The case
of dynamic holes is treated by assembling t-J ladders oriented perpendicular to
the str... | 1994-08-05 | 2007-05-23 | [
"cond-mat"
] | Hirokazu Tsunetsugu, Matthias Troyer, and T. M. Rice |
cond-mat/9408021 | NMR in ``underdoped'' and ``overdoped'' YBaCuO compounds: fermi-liquid
approach | We examine the NMR experimental data for the normal state of
YBa$_2$Cu$_3$O$_{7-\delta}$ within the Fermi-liquid approach. We show that the
observed temperature dependence of the Knight shift and $^{17}$O ($^{89}$Y)
relaxation rate in ``underdoped'' ( $T_c=60\,$K ) compound can be interpreted
as resulting from a peak i... | 1994-08-05 | 2009-10-22 | [
"cond-mat"
] | D.N. Aristov and A.G. Yashenkin |
cond-mat/9408027 | Plasma Resonance in Layered Normal Metals and Superconductors | A microscopic theory of the plasma resonance in layered metals is presented.
It is shown that electron-impurity scattering can suppress the plasma resonance
in the normal state and sharpen it in the superconducting state. Analytic
properties of the conductivity for the electronic transport perpendicular to
the layers a... | 1994-08-05 | 2009-10-22 | [
"cond-mat"
] | S.V. Pokrovsky and V.L.Pokrovsky |
cond-mat/9408019 | Electronic Raman scattering in superconductors as a probe of anisotropic
electron pairing | A gauge invariant theory for electronic Raman scattering for superconductors
with anisotropic pairing symmetry is analyzed in detail. It is shown that Raman
scattering in anisotropic superconductors provides a wealth of
polarization-dependent information which probes the detailed angular dependence
of the superconducti... | 1994-08-04 | 2009-10-22 | [
"cond-mat"
] | T. P. Devereaux and D. Einzel |
cond-mat/9408015 | Haldane's Fractional Exclusion Statistics for Multicomponent Systems | The idea of fractional exclusion statistics proposed by Haldane is applied to
systems with internal degrees of freedom, and its thermodynamics is examined.
In case of one dimension, various bulk quantities calculated show that the
critical behavior of such systems can be described by $c=1$ conformal field
theories and ... | 1994-08-04 | 2009-10-22 | [
"cond-mat",
"hep-th"
] | Takahiro Fukui and Norio Kawakami |
cond-mat/9408014 | Conditions on the Existence of Localized Excitations in Nonlinear
Discrete Systems | We use recent results that localized excitations in nonlinear Hamiltonian
lattices can be viewed and described as multiple-frequency excitations. Their
dynamics in phase space takes place on tori of corresponding dimension. For a
one-dimensional Hamiltonian lattice with nearest neighbour interaction we
transform the pr... | 1994-08-04 | 2007-05-23 | [
"cond-mat"
] | S. Flach |
cond-mat/9408017 | Distribution of "level velocities" in quasi 1D disordered or chaotic
systems with localization | The explicit analytical expression for the distribution function of
parametric derivatives of energy levels ("level velocities") with respect to a
random change of scattering potential is derived for the chaotic quantum
systems belonging to the quasi 1D universality class (quantum kicked rotator,
"domino" billiard, dis... | 1994-08-04 | 2009-10-22 | [
"cond-mat"
] | Yan V. Fyodorov |
cond-mat/9408016 | Renormalization Group Approach to Low Temperature Properties of a
Non-Fermi Liquid Metal | We expand upon on an earlier renormalization group analysis of a non-Fermi
liquid fixed point that plausibly govers the two dimensional electron liquid in
a magnetic field near filling fraction $\nu=1/2$. We give a more complete
description of our somewhat unorthodox renormalization group transformation by
relating bot... | 1994-08-04 | 2009-10-22 | [
"cond-mat",
"hep-th"
] | Chetan Nayak and Frank Wilczek |
cond-mat/9408018 | A Three-Dimensional Conformal Field Theory | This talk is based on a recent paper$^{1}$ of ours. In an attempt to
understand three-dimensional conformal field theories, we study in detail one
such example --the large $N$ limit of the $O(N)$ non-linear sigma model at its
non-trivial fixed point -- in the zeta function regularization. We study this
on various three... | 1994-08-04 | 2007-05-23 | [
"cond-mat",
"hep-th"
] | S.Guruswamy, S.G.Rajeev and P.Vitale |
cond-mat/9408008 | Exact calculation of the ground state single-particle Green's function
for the $1/r^2$ quantum many body system at integer coupling | The ground state single particle Green's function describing hole propagation
is calculated exactly for the $1/r^2$ quantum many body system at integer
coupling. The result is in agreement with a recent conjecture of Haldane. | 1994-08-03 | 2009-10-22 | [
"cond-mat"
] | P.J. Forrester |
cond-mat/9408012 | Theory for the Nonlinear Optical Response of Transition-Metals:
Polarization Dependence as a Fingerprint of the Electronic Structure at
Surfaces and Interfaces | We show that the nonlinear optical response reflects sensitively the
electronic structure of transition-metal surfaces and interfaces. $d$ and $s$
electrons may contribute rather differently to the second harmonic generation
(SHG) signal. This results from the different sensitivity of $d$ and $s$
electrons to surface a... | 1994-08-03 | 2007-05-23 | [
"cond-mat"
] | W. H"ubner, K. H. Bennemann, and K. B\"ohmer |
cond-mat/9408011 | Scaling of Reaction Zones in the A+B->0 Diffusion-Limited Reaction | We study reaction zones in three different versions of the A+B->0 system. For
a steady state formed by opposing currents of A and B particles we derive
scaling behavior via renormalization group analysis. By use of a previously
developed analogy, these results are extended to the time-dependent case of an
initially seg... | 1994-08-03 | 2009-10-22 | [
"cond-mat"
] | Benjamin P. Lee and John Cardy |
cond-mat/9408010 | Manifestation of spin degrees of freedom in the double fractional
quantum Hall system | The double fractional quantum Hall system of spin 1/2 electrons is
numerically studied to predict that there exists a novel spin-unpolarized
quantum liquid specific to the multi-species system, which exemplifies a link
between the spin state and the inter-layer electron correlation. Even when the
ground state is spin-p... | 1994-08-03 | 2009-10-22 | [
"cond-mat"
] | T. Nakajima and H. Aoki |
cond-mat/9408013 | On the Localization of Heavy Particles in Metals | It has been conjectured that an impurity with charge Z greater or equal to 2
can be localized due to its interaction with electrons in a metal. The simplest
case is an impurity free to move between only two sites, which interacts
locally with s-wave electrons. For Z greater or equal to 2 the hopping of the
impurity is ... | 1994-08-03 | 2016-08-31 | [
"cond-mat"
] | Daniel S. Fisher and Aris L. Moustakas |
cond-mat/9408009 | The Anderson-Mott Transition as a Random-Field Problem | The Anderson-Mott transition of disordered interacting electrons is shown to
share many physical and technical features with classical random-field systems.
A renormalization group study of an order parameter field theory for the
Anderson-Mott transition shows that random-field terms appear at one-loop
order. They lead... | 1994-08-03 | 2009-10-22 | [
"cond-mat"
] | T.R.Kirkpatrick and D.Belitz |
cond-mat/9408005 | Mean Field Description of Kondo-Stabilized Spin Liquid in Kondo Lattice
with Heavy Fermions | Microscopic mechanism of forming the spin liquid of neutral fermions in Kondo
lattices with nearly integer valence of the f-electrons in presented. It is
shown that the competition between the Kondo scattering and the indirect
exchange interaction can result in stabilization of a state with separated spin
and charge ex... | 1994-08-02 | 2007-05-23 | [
"cond-mat"
] | K.A.Kikoin, M.N.Kiselev and A.S.Mishchenko |
cond-mat/9408007 | Permanent State Reduction: Motivations, Results, and By-Products | We enlist various motivations underlying the idea that von Neumann collapses
occure permanently, spontaneously and even universally. In addition to the
conceptual value of permanent reduction theory, we mention its important
by-product promoting new quantum Monte-Carlo simulations of irrevesible quantum
processes, espe... | 1994-08-02 | 2007-05-23 | [
"cond-mat",
"gr-qc"
] | Lajos Di\'osi |
cond-mat/9408003 | Boundaries and junctions in two parity violating models in 2+1
dimensions | Recently it has been suggested that junctions between materials with
different parity violating properties would be characterized by diffusion
layers, analogous to those in the p-n junction. This remark is amplified by a
fuller investigation of two related parity violating effective Lagrangians,
which possess a kind of... | 1994-08-02 | 2016-08-31 | [
"cond-mat",
"hep-th"
] | Mark Burgess and Margaret Carrington |
cond-mat/9408006 | Classical Analysis of Phenomenological Potentials for Metallic Clusters | The classical trajectories of single particle motion in a Wodds-Saxon and a
modified Nilsson potential are studied for axial quadrupole deformation. Both
cases give rise to chaotic behaviour when the deformation in the Woods-Saxon
and the l**2 term in the modified Nilsson potential are turned on. Important
similarities... | 1994-08-02 | 2009-10-22 | [
"cond-mat",
"nucl-th"
] | W.D. Heiss and R.G. Nazmitdinov |
cond-mat/9408004 | Composite-Fermion Picture for the Spin-Wave Excitation in the fractional
quantum Hall system | Spin-wave excitation mode from the spin-polarized ground state in the
fractional quantum Hall liquid with odd fractions ($\nu=1/3,1/5$) numerically
obtained by the exact diagonalization of finite systems is shown to be
accurately described, for wavelengths exceeding the magnetic length, in terms
of the composite-fermio... | 1994-08-02 | 2009-10-22 | [
"cond-mat"
] | T. Nakajima and H. Aoki |
cond-mat/9408002 | Quasi-Ballistic Electron Transport in Random Superlattices | We theoretically study electron transport in disordered, quantum-well based,
semiconductor superlattices with structural short-range correlations. Our
system consists of equal width square barriers and quantum wells with two
different thicknesses. The two kinds of quantum wells are randomly distributed
along the growth... | 1994-08-01 | 2009-10-22 | [
"cond-mat"
] | Francisco Dominguez-Adame, Angel Sanchez, and Enrique Diez |
cond-mat/9408001 | Equilibrium Dynamics of Microemulsion and Sponge Phases | The dynamic structure factor $G({\bf k},\omega)$ is studied in a
time-dependent Ginzburg-Landau model for microemulsion and sponge phases in
thermal equilibrium by field-theoretic perturbation methods. In bulk contrast,
we find that for sufficiently small viscosity $\eta$, the structure factor
develops a peak at non-ze... | 1994-08-01 | 2009-10-22 | [
"cond-mat"
] | G. Gompper and M. Hennes |
cond-mat/9407124 | Josephson current through a Luttinger liquid | We study the Josephson effect through a one-dimensional system of interacting
electrons, connected to two superconductors by tunnel junctions. The
interactions are treated in the framework of the one-channel Luttinger model.
At zero temperature, the Josephson critical current is found to decay
algebraically with increa... | 1994-08-01 | 2009-10-22 | [
"cond-mat"
] | Rosario Fazio, F. W. J. Hekking, and A. A. Odintsov |
cond-mat/9407123 | Tunneling Gap as Evidence for Time-Reversal Symmetry Breaking at
Surfaces of High-Temperature Superconductors | It is argued that recent Josephson junction and point-contact tunneling
experiments, interpreted as intended by their authors, indicate that
time-reversal symmetry breaking occurs at surfaces of cuprate superconductors.
The variation among experiments and the failure of previous searches to find
$T$-violation are ascri... | 1994-07-31 | 2009-10-22 | [
"cond-mat"
] | R. B. Laughlin |
cond-mat/9407121 | Time Evolution of an Anharmonic Oscillator Interacting with a Squeezed
Bath | The evolution of a single mode of the electromagnetic field interacting with
a squeezed bath in a Kerr medium is considered. The solution of the
corresponding master equation is given numerically. It is argued that the
creation of a superposition state (Schr\"odinger's cat) is better achieved in
presence of a squeezed ... | 1994-07-30 | 2007-05-23 | [
"cond-mat",
"hep-th"
] | G.M. D'Ariano, M.Fortunato and P. Tombesi |
cond-mat/9407120 | Scaling behavior in the dynamics of a supercooled Lennard-Jones mixture | We present the results of a large scale molecular dynamics computer
simulation of a binary, supercooled Lennard-Jones fluid. At low temperatures
and intermediate times the time dependence of the intermediate scattering
function is well described by a von Schweidler law. The von Schweidler exponent
is independent of tem... | 1994-07-30 | 2009-10-22 | [
"cond-mat"
] | Walter Kob and Hans C. Andersen |
cond-mat/9407122 | Isotropic Phase-Number Squeezing and Macroscopic Quantum Coherence | A new master equation performing isotropic phase-number squeezing is
suggested. The phase properties of coherent superpositions are analyzed when
the state evolves in presence of a bath with fluctuations squeezed in this
isotropic way. We find that such a reservoir greatly improves persistence of
coherence with respect... | 1994-07-30 | 2009-10-22 | [
"cond-mat",
"hep-th"
] | G.M. D'Ariano, M.Fortunato and P. Tombesi |
cond-mat/9407116 | A polynomial training algorithm for calculating perceptrons of optimal
stability | Recomi (REpeated COrrelation Matrix Inversion) is a polynomially fast
algorithm for searching optimally stable solutions of the perceptron learning
problem. For random unbiased and biased patterns it is shown that the algorithm
is able to find optimal solutions, if any exist, in at worst O(N^4) floating
point operation... | 1994-07-29 | 2009-10-22 | [
"cond-mat"
] | Jorg Imhoff (University of Heidelberg) |
cond-mat/9407118 | Scaling behavior in the $\beta$-relaxation regime of a supercooled
Lennard-Jones mixture | We report the results of a molecular dynamics simulation of a supercooled
binary Lennard-Jones mixture. By plotting the self intermediate scattering
functions vs. rescaled time, we find a master curve in the $\beta$-relaxation
regime. This master curve can be fitted well by a power-law for almost three
decades in resca... | 1994-07-29 | 2009-10-22 | [
"cond-mat"
] | Walter Kob, Hans C. Andersen |
cond-mat/9407119 | Partition Function Zeros of an Ising Spin Glass | We study the pattern of zeros emerging from exact partition function
evaluations of Ising spin glasses on conventional finite lattices of varying
sizes. A large number of random bond configurations are probed in the framework
of quenched averages. This study is motivated by the relationship between
hierarchical lattice... | 1994-07-29 | 2009-10-22 | [
"cond-mat",
"hep-lat"
] | P.H. Damgaard and J. Lacki |
cond-mat/9407117 | Theory of Valence-Bond Lattice on Spin Lattice | Quantum spin-lattice systems in low dimensions exhibit a variety of
interesting zero-temperature phases, some of which show non-classical (i.e.,
non-magnetic) long-range orders, such as dimer or trimer valence-bond order.
These symmetry-breaking systems with localized valence bonds are referred to as
valence-bond latti... | 1994-07-29 | 2007-05-23 | [
"cond-mat"
] | Yang XIAN (Department of Mathematics, UMIST, Manchester, England) |
cond-mat/9407109 | Electromagnetic waves in a Josephson junction in a thin film | We consider a one-dimensional Josephson junction in a superconducting film
with the thickness that is much less than the London penetration depth. We
treat an electromagnetic wave propagating along this tunnel contact. We show
that the electrodynamics of a Josephson junction in a thin film is nonlocal if
the wave lengt... | 1994-07-28 | 2009-10-22 | [
"cond-mat"
] | R.G. Mints and I.B. Snapiro |
cond-mat/9407114 | Lattices of matrices (revised) | We study a new class of matrix models, formulated on a lattice. On each site
are $N$ states with random energies governed by a Gaussian random matrix
Hamiltonian. The states on different sites are coupled randomly. We calculate
the density of and correlation between the eigenvalues of the total Hamiltonian
in the large... | 1994-07-28 | 2009-10-22 | [
"cond-mat",
"hep-th"
] | E. Br\'ezin, A. Zee |
cond-mat/9407110 | Protein-Machine model of a single enzymatic reaction | The theory of biochemical processes needs simple but realistic models of
phenomena underlying microscopic dynamics of proteins. Many experiments
performed in the 1980s have demonstrated that within the protein native state,
apart from usual vibrational dynamics, a rich interconformational (activated)
dynamics exists. T... | 1994-07-28 | 2007-05-23 | [
"cond-mat",
"q-bio"
] | Michal Kurzynski |
cond-mat/9407113 | Temperature relaxation and the Kapitza boundary resistance paradox | The calculation of the Kapitza boundary resistance between dissimilar
harmonic solids has since long (Little [Can. J. Phys. 37, 334 (1959)]) suffered
from a paradox: this resistance erroneously tends to a finite value in the
limit of identical solids. We resolve this paradox by calculating temperature
differences in th... | 1994-07-28 | 2007-05-23 | [
"cond-mat"
] | Alec Maassen van den Brink and H. Dekker |
cond-mat/9407115 | Generalization of the density-matrix method to a non-orthogonal basis | We present a generalization of the Li, Nunes and Vanderbilt density-matrix
method to the case of a non-orthogonal set of basis functions. A representation
of the real-space density matrix is chosen in such a way that only the overlap
matrix, and not its inverse, appears in the energy functional. The generalized
energy ... | 1994-07-28 | 2009-10-22 | [
"cond-mat"
] | R. W. Nunes and David Vanderbilt |
cond-mat/9407111 | Frustrated Bonds and Long Range Order in Quasi-2D Magnets | We employ the Schwinger boson mean-field approach to study the effects of
arbitrary frustrated bonds and plaquettes (formed from four frustrated bonds)
in two-dimensional ferro- and antiferromagnets on the spin-wave spectrum and
the correlation length at finite temperatures. We distinguish between strongly
frustrated b... | 1994-07-28 | 2009-10-22 | [
"cond-mat"
] | I. Ya. Korenblit |
cond-mat/9407112 | Quantum disordered phase in a doped antiferromagnet | A quantitative description of the transition to a quantum disordered phase in
a doped antiferromagnet is obtained with a U(1) gauge-theory, where the gap in
the spin-wave spectrum determines the strength of the gauge-fields. They
mediate an attractive long-range interaction whose possible bound-states
correspond to cha... | 1994-07-28 | 2009-10-22 | [
"cond-mat"
] | C. Kuebert and A. Muramatsu (Institut fuer theoretische Physik der
Universitaet Wuerzburg, Am Hubland, 97074 Wuerzburg, Germany) |
cond-mat/9407107 | Nonlinear Localized Excitations and the Dynamics of H-Bonds in DNA | We analyze typical models which intend to describe (parts of) the dynamics of
H-Bonds in DNA. We show that these models generically allow for nonlinear
localized excitatons (NLEs) (discrete breathers). We especially study the
scattering of phonons by NLEs and observe strong reflection of phonons by the
NLE. We relate o... | 1994-07-27 | 2007-05-23 | [
"cond-mat",
"q-bio"
] | S. Flach and C. R. Willis |
cond-mat/9407108 | Localized Excitations in two-dimensional Hamiltonian Lattices | We analyze the origin and features of localized excitations in a discrete
two-dimensional Hamiltonian lattice. The lattice obeys discrete translational
symmetry, and the localized excitations exist because of the presence of
nonlinearities. We connect the presence of these excitations with the existence
of local integr... | 1994-07-27 | 2009-10-22 | [
"cond-mat"
] | S. Flach, K. Kladko and C. R. Willis |
cond-mat/9407106 | The Chiral Potts Models Revisited | In honor of Onsager's ninetieth birthday, we like to review some exact
results obtained so far in the chiral Potts models and to translate these
results into language more transparent to physicists, so that experts in Monte
Carlo calculations, high and low temperature expansions, and various other
methods, can use them... | 1994-07-27 | 2011-09-14 | [
"cond-mat",
"hep-th"
] | Helen Au-Yang and Jacques H.H. Perk (Dept. of Physics, Oklahoma State
University, Stillwater, OK USA) |
cond-mat/9407105 | Dynamical Behaviour of Low Autocorrelation Models | We have investigated the nature of the dynamical behaviour in low
autocorrelation binary sequences. These models do have a glass transition $T_G$
of a purely dynamical nature. Above the glass transition the dynamics is not
fully ergodic and relaxation times diverge like a power law $\tau\sim
(T-T_G)^{-\gamma}$ with $\g... | 1994-07-27 | 2009-10-22 | [
"cond-mat"
] | Gabriele Migliorini and Felix Ritort |
cond-mat/9407104 | Toulouse limit for the overscreened four-channel Kondo problem | We show that the spin dynamics of the 4--channel Kondo model is equivalent to
the one of a model with a spin 1/2 impurity coupled to spin 1 conduction
electrons. By abelian bosonization of the latter model we find a kind of
Toulouse limit analogous to that recently discussed by Emery and Kivelson for
the 2--channel cas... | 1994-07-26 | 2009-10-22 | [
"cond-mat",
"hep-th"
] | M. Fabrizio and Alexander O. Gogolin |
cond-mat/9407103 | Selected Topics in the Theory of 1D Quantum Wires | Lecture given at the Landau Institute Seminar, Col de Port, March 1994,
intended for a qualitative discussion of recent theoretical results in the
physics of 1D quantum wires. The consideration is mainly focused on observable
quantities, such as conductance, persistent current, and X-Ray response
functions, which are d... | 1994-07-26 | 2009-10-22 | [
"cond-mat"
] | Alexander O. Gogolin |
cond-mat/9407097 | Hole pockets in the t-J model | We present an exact diagonalization study of the electron momentum
distribution n(k) in small clusters of t-J model for different hole
concentrations and t/J. Structures in n(k) which were previously interpreted as
a `large' Fermi surface are identified as originating from the well known
many-body backflow. To obtain r... | 1994-07-25 | 2009-10-22 | [
"cond-mat"
] | R. Eder and Y. Ohta (Department of Applied Physics, Nagoya University,
Nagoya, Japan) |
cond-mat/9407100 | Diffusion Processes and Coherent States | It is shown that stochastic processes of diffusion type possess, in all
generality, a structure of uncertainty relations and of coherent and squeezed
states. This fact is used to obtain, via Nelson stochastic formulation of
quantum mechanics, the harmonic-oscillator coherent and squeezed states. The
method allows to de... | 1994-07-25 | 2009-10-22 | [
"cond-mat",
"chao-dyn",
"nlin.CD"
] | S. De Martino, S. De Siena, F. Illuminati and G. Vitiello |
cond-mat/9407101 | Magnetic phase diagram of the Hubbard model | The competition between commensurate and incommensurate spin-density-wave
phases in the infinite-dimensional single-band Hubbard model is examined with
quantum Monte Carlo simulation and strong and weak coupling approximations.
Quantum fluctuations modify the weak-coupling phase diagram by factors of order
unity and pr... | 1994-07-25 | 2009-10-22 | [
"cond-mat"
] | J. K. Freericks and Mark Jarrell |
cond-mat/9407102 | Impurity-Induced Virtual Bound States in d-Wave Superconductors | It is shown that a single, strongly scattering impurity produces a bound or a
virtual bound quasiparticle state inside the gap in a $d$-wave superconductor.
The explicit form of the bound state wave function is found to decay
exponentially with angle-dependent range. These states provide a natural
explanation of the se... | 1994-07-25 | 2009-10-22 | [
"cond-mat"
] | A.V.Balatsky, M.I.Salkola, and A.Rosengren |
cond-mat/9407098 | Magnetoresistance of a 2-dimensional electron gas in a random magnetic
field | We report magnetoresistance measurements on a two-dimensional electron gas
(2DEG) made from a high mobility GaAs/AlGaAs heterostructure, where the
externally applied magnetic field was expelled from regions of the
semiconductor by means of superconducting lead grains randomly distributed on
the surface of the sample. A... | 1994-07-25 | 2009-10-22 | [
"cond-mat"
] | Anders Smith, Rafael Taboryski, Luise Theil Hansen, Claus B. Sorensen,
Per Hedegard and P. E. Lindelof (Niels Bohr Institute, Copenhagen) |
cond-mat/9407099 | On Perturbation Theory Around the Atomic Limit of Strongly Correlated
Electron Systems: A New Approach Based on Wick's Theorem | A new perturbational approach to spectral and thermal properties of strongly
correlated electron systems is presented: The Anderson model is reexamined for
$U\to\infty$\,, and it is shown that an expansion of Green's functions with
respect to the hybridization $V$ built on Feynman diagrams obeying standard
rules is pos... | 1994-07-25 | 2009-10-22 | [
"cond-mat",
"hep-th"
] | Jan Brinckmann (Techn. Hochschule Darmstadt, Germany) |
cond-mat/9407096 | Tunneling in the Electron Box in the Nonperturbative Regime | We study charging effects and tunneling in the single electron box. Tunneling
mixes different charge states and in the nonperturbative regime the charge in
the island may be strongly screened. When charge states are nearly degenerate
the screening of the charge is strong even in the weak tunneling regime.
Virtual tunne... | 1994-07-23 | 2009-10-22 | [
"cond-mat"
] | G. Falci, J. Heins, Gerd Schoen and Gergely T. Zimanyi |
cond-mat/9407095 | $W_{1+\infty}$ Dynamics of Edge Excitations in the Quantum Hall Effect | Quantum Hall universality classes can be classified by $W_{1+\infty}$
symmetry. We show that this symmetry also governs the dynamics of quantum edge
excitations. The Hamiltonian of interacting electrons in the fully-filled first
Landau level is expressed in terms of $W_{1+\infty}$ generators. The spectra
for both the C... | 1994-07-23 | 2015-06-25 | [
"cond-mat",
"hep-th"
] | A. Cappelli, C. A. Trugenberger and G. R. Zemba |
cond-mat/9407093 | On the Liaison Between Superconductivity and Phase Separation | Models of strongly correlated electrons that tend to phase separate are
studied including a long-range 1/r repulsive interaction. It is observed that
charge-density-wave states become stable as the strength of the 1/r term, ${\rm
V_{coul}}$, is increased. Due to this effect, the domain of stability of the
superconducti... | 1994-07-22 | 2009-10-22 | [
"cond-mat"
] | Stephan Haas, Elbio Dagotto, Alexander Nazarenko, and Jose Riera |
cond-mat/9407088 | Numerical Study of a Two-Dimensional Quantum Antiferromagnet with Random
Ferromagnetic Bonds | A Monte Carlo method for finite-temperature studies of the two-dimensional
quantum Heisenberg antiferromagnet with random ferromagnetic bonds is
presented. The scheme is based on an approximation which allows for an analytic
summation over the realizations of the randomness, thereby significantly
alleviating the ``sign... | 1994-07-22 | 2009-10-22 | [
"cond-mat"
] | A. Sandvik |
cond-mat/9407089 | Self-Consistent Theory of Superconducting Mesoscopic Weak Links | A microscopic model for describing a superconducting mesoscopic weak link is
presented. We consider a model geometry consisting of a narrow channel coupled
to wider superconducting electrodes which act as reservoirs fixing the
asymptotic values of the complex order parameter. For this model, the
Bogoliubov-de Gennes eq... | 1994-07-22 | 2009-10-22 | [
"cond-mat"
] | A. Levy Yeyati, A. Martin-Rodero and F.J. Garcia-Vidal |
cond-mat/9407090 | Incoherent Exciton Trapping in Self-Similar Aperiodic Lattices | Incoherent exciton dynamics in one-dimensional perfect lattices with traps at
sites arranged according to aperiodic deterministic sequences is studied. We
focus our attention on Thue-Morse and Fibonacci systems as canonical examples
of self-similar aperiodic systems. Excitons progressively extend over the
lattice on in... | 1994-07-22 | 2009-10-22 | [
"cond-mat"
] | Francisco Dominguez-Adame, Enrique Macia, and Angel Sanchez |
cond-mat/9407087 | Fractional Vortices as Evidence of Time-Reversal Symmetry Breaking in
High-Temperature Superconductors | We argue that recent experiments by Kirtley et al. may show evidence of time
reversal symmetry breaking in YBCO at crystal grain boundaries. We illustrate
this through a Ginzburg-Landau model calculation. Further experimental tests
are proposed. | 1994-07-22 | 2009-10-22 | [
"cond-mat"
] | M. Sigrist, D. B. Bailey and R. B. Laughlin |
cond-mat/9407092 | Subminimal Paths on a Stochastic Graph | A simple model of a frustrated disordered system is presented. Apart from the
(very different) physical interpretation, the model shares many features with
that of Sherrington-Kirkpatrick for spin glasses, but, as a consequence of its
relative simplicity, its ground state can be exactly determined by numerical
methods.... | 1994-07-22 | 2007-05-23 | [
"cond-mat"
] | Giovanni Ferraro |
cond-mat/9407091 | Infinite Volume Relaxation in the Sherrington-Kirkpatrick Model | In a recent work (Eissfeller and Opper, 1992) a numerical method has been
proposed to simulate off-equilibrium zero-temperature parallel dynamics for the
SK model without finite size effects. We study the extension of the method to
non-zero temperature and sequential dynamics, and analyze more carefully the
involved co... | 1994-07-22 | 2007-05-23 | [
"cond-mat"
] | Giovanni Ferraro |
cond-mat/9407094 | X-Ray Scattering Measurements of the Transient Structure of a Driven
Charge-Density-Wave | We report time-resolved x-ray scattering measurements of the transient
structural response of the sliding {\bf Q}$_{1}$ charge-density-wave (CDW) in
NbSe$_{3}$ to a reversal of the driving electric field. The observed time scale
characterizing this response at 70K varies from $\sim$ 15 msec for driving
fields near thre... | 1994-07-22 | 2009-10-22 | [
"cond-mat"
] | E. Sweetland, A.C. Finnefrock, W.J. Podulka, M. Sutton and J.D. Brock |
cond-mat/9407086 | Matrix models as solvable glass models | We present a family of solvable models of interacting particles in high
dimensionalities without quenched disorder. We show that the models have a
glassy regime with aging effects. The interaction is controlled by a parameter
$p$. For $p=2$ we obtain matrix models and for $p>2$ `tensor' models. We
concentrate on the ca... | 1994-07-21 | 2009-10-22 | [
"cond-mat",
"hep-th"
] | L. F. Cugliandolo, J. Kurchan, G. Parisi and F. Ritort |
cond-mat/9407085 | Vortices and hierarchy of states in double-layer fractional Hall effect | Vortex solutions in $U(1)\times U(1)$ Chern-Simons theory coupled to a pair
of hard-core bosons representing two layers of electrons are analysed. It is
shown that there is such a range of parameters $(\alpha\beta<\gamma^{2})$ in
which finite charge $(1,0)$ or $(0,1)$ vortices can not exist. Instead the
minimal flux qu... | 1994-07-21 | 2016-08-31 | [
"cond-mat",
"hep-th"
] | Jacek Dziarmaga |
cond-mat/9407084 | Scaling and Multiscaling in Models of Fragmentation | We introduce a simple geometric model which describes the kinetics of
fragmentation of d-dimensional objects. In one dimension our model coincides
with the random scission model and show a simple scaling behavior in the
long-time limit. For d>1, the volume of the fragments is characterized by a
single scale 1/t, while ... | 1994-07-20 | 2009-10-22 | [
"cond-mat"
] | P. L. Krapivsky and E. Ben-Naim |
cond-mat/9407081 | Kinetic Roughening in Growth Models with Diffusion in Higher Dimensions | We present results of numerical simulations of kinetic roughening for a
growth model with surface diffusion (the Wolf-Villain model) in 3+1 and
4+1~dimensions using lattices of a linear size up to $L=64$ in 3+1~D and $L=32$
in 4+1~D. The effective exponents calculated both from the surface width and
from the height--he... | 1994-07-19 | 2009-10-22 | [
"cond-mat"
] | P. \v{S}milauer and M. Kotrla |
cond-mat/9407083 | Electron Band Structure in a Two Dimensional Periodic Magnetic Field | In this paper we study the energy spectrum of a two dimensional electron gas
(2DEG) in a two dimensional periodic magnetic field. Both a square magnetic
lattice and a triangular one are considered. We consider the general case where
the magnetic field in a cell can be of any shape. A general feature of the band
structu... | 1994-07-19 | 2009-10-22 | [
"cond-mat"
] | M.C.Chang and Q.Niu |
cond-mat/9407080 | Enhanced Electron Pairing in a Lattice of Berry Phase Molecules | We show that electron hopping in a lattice of molecules possessing a Berry
phase naturally leads to pairing. Our building block is a simple molecular site
model inspired by C$_{60}$, but realized in closer similarity with Na$_3$. In
the resulting model electron hopping must be accompanied by orbital operators,
whose fu... | 1994-07-19 | 2009-10-22 | [
"cond-mat"
] | N. Manini, E. Tosatti, and S. Doniach |
cond-mat/9407082 | Self-Organized Criticality in Non-conserved Systems | The origin of self-organized criticality in a model without conservation law
(Olami, Feder, and Christensen, Phys. Rev. Lett. {\bf 68}, 1244 (1992)) is
studied. The homogeneous system with periodic boundary condition is found to be
periodic and neutrally stable. A change to open boundaries results in the
invasion of th... | 1994-07-19 | 2009-10-22 | [
"cond-mat"
] | A. Alan Middleton and Chao Tang |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.